Oil boiler fires up even when everything is off

[Kalotina]

Hi

Even if both heating and hot water controls are off the boiler fires up several times an hour, goes for a while and then off again...
The only way to stop it is to turn the central thermostat -the one on the boiler- to 0. But that means that you cannot program anything as you have to manually turn the thermostat back on again...any ideas?
thanks
tina

 

[Bamba71]

has it got a frost stat?

 

[45yearsagasman]

If its not the frost stat(not that cold yet)you may have motorised valves for heating and hot water and it may well be a faulty end switch sticking on and powering up the boiler.Check near the cylinder for motorised valves.

 

[Kalotina]

Thanks to both 45yearsagasman and Bamba71....And sorry for the very late reply, i thought i'd have a look first at your suggestions and then come back to you...and as the problem disappreared now with the cold i kind of forgot all about it...thanks again